高耐候性Q450NQR1货车车厢板的开发  

Development of Hot Rolling Plate Q450NQR1 With High Corrosion Resistant for Railway Boxcar

作　　者：卢军辉[1] 王晓春[2] 刘家琪[1] 张成武[2] 张慧[1] 朴峰云[2] 

机构地区：[1]钢铁研究总院先进钢铁流程及材料国家重点实验室,北京100081 [2]通化钢铁股份有限公司技术中心,吉林通化134000

出　　处：《钢铁》2013年第2期75-79,共5页Iron and Steel

摘　　要：通过设计合理的化学成分,采用铁水预处理—120t转炉—LF精炼—FTSC连铸机—2机架粗轧+5机架精轧—卷取工艺流程,借助控轧控冷工艺,成功生产了高耐候性Q450NQR1货车车厢板。检验结果表明:该钢板组织为铁素体(F)+少量珠光体(P),晶粒度评级为12级;板卷各项力学性能均能满足要求,平均屈服强度509.2MPa,平均抗拉强度580MPa,平均屈强比0.88,平均伸长率30.1%,-40℃V型冲击功达到170J左右。该产品耐腐蚀性能优良,与Q345B相比,Q450NQR1 144h的腐蚀率要低33.33%,可满足供货要求。The hot rolling plate Q450NQR1 with high corrosion resistant for railway boxcar was developed by hot metal pre-treatment—120 t top and bottom combined blown converter—LF refining—FTSC continuous casting machine—2R—5F mill—coiling with TMCP process.The results show that the microstructure of plate is ferrite-pearlite and grain size rating is 12,the yield strength and tensile strength are 509.2 MPa and 580 MPa,respectively.The impact absorbing energy at-40 ℃ is about 170 J,and corrosion resistant is very good,and the corrosion rate for 144 h is decreased 33.33% compared with the Q345B.The production can meet the requirement of railway boxcar.

关 键 词：高耐候性 货车车厢 控轧控冷 固溶物 

分 类 号：U272[机械工程—车辆工程]